diff --git a/README.md b/README.md
index 6dfb260..2e3f397 100644
--- a/README.md
+++ b/README.md
@@ -14,11 +14,11 @@ https://github.com/mariux/mxq
 ## Installation
 ### Install using `GNU make`
 ```
-make
 make install
 ```
+
+or to specify a prefix:
 ```
-make PREFIX=...
 make PREFIX=... [DESTDIR=...] install
 ```
 ### Install using `bee`
@@ -26,18 +26,25 @@ make PREFIX=... [DESTDIR=...] install
 bee init $(bee download git://github.molgen.mpg.de/mariux64/mxq.git) --execute
 bee update mxq
 ```
+
+or to specify a prefix
 ```
 bee init $(bee download git://github.molgen.mpg.de/mariux64/mxq.git) --prefix=... --execute
 bee update mxq
 ```
 
 ## Initial setup
-Definitions of the tables and triggers for the MySQL database can be found in
+Definitions of the tables for the MySQL database can be found in
 [mysql/create_tables.sql](https://github.molgen.mpg.de/mariux64/mxq/blob/master/mysql/create_tables.sql)
+and
+[mysql/create_trigger.sql](https://github.molgen.mpg.de/mariux64/mxq/blob/master/mysql/create_trigger.sql)
 Be sure to create those once and check the same 
 [directory for alter_tables*.sql`](https://github.molgen.mpg.de/mariux64/mxq/blob/master/mysql/)
 files when upgrading. 
-
+```
+mysql [options] [database] <mysql/create_tables.sql
+mysql [options] [database] <mysql/create_trigger.sql
+```
 
 ## Development builds
 The `devel` target in the Makefile will enable all devolopment features
diff --git a/mx_log.c b/mx_log.c
index 8ed9588..ba5a8d5 100644
--- a/mx_log.c
+++ b/mx_log.c
@@ -87,7 +87,7 @@ int mx_log_printf(const char *fmt, ...)
     res  = fflush(stderr);
     mx_free_null(msg);
 
-    if (len2 != len)
+    if (len2 != len+1)
         return -(errno=EIO);
 
     if (!res)
@@ -137,12 +137,11 @@ static int log_log(int level, int loglevel, char *file, unsigned long line, cons
     return mx_log_printf("%s%s", prefix, msg);
 }
 
-int mx_log_do(int level, char *file, unsigned long line, const char *func, const char *fmt, ...)
+int mx_logva_do(int level, char *file, unsigned long line, const char *func, const char *fmt, va_list ap)
 {
     int loglevel;
     int len;
     char *msg = NULL;
-    va_list ap;
     int res;
     int preserved_errno = errno;
 
@@ -153,9 +152,7 @@ int mx_log_do(int level, char *file, unsigned long line, const char *func, const
         return 0;
     }
 
-    va_start(ap, fmt);
     len = vasprintf(&msg, fmt, ap);
-    va_end(ap);
 
     if (len == -1) {
         errno = preserved_errno;
@@ -173,6 +170,18 @@ int mx_log_do(int level, char *file, unsigned long line, const char *func, const
     return res;
 }
 
+int mx_log_do(int level, char *file, unsigned long line, const char *func, const char *fmt, ...)
+{
+    va_list ap;
+    int res;
+
+    va_start(ap, fmt);
+    res = mx_logva_do(level, file, line, func, fmt, ap);
+    va_end(ap);
+
+    return res;
+}
+
 int mx_log_finish(void)
 {
     if (mx_log_log)
diff --git a/mx_log.h b/mx_log.h
index 48c6098..8b17631 100644
--- a/mx_log.h
+++ b/mx_log.h
@@ -22,6 +22,7 @@
 #define MX_LOG_DEBUG   MX_LOG_SYSLOG_TO_MXLOG(LOG_DEBUG)   /* debug-level messages */
 
 #define mx_log(level, fmt, ...)  mx_log_do((level), __FILE__, __LINE__, __func__, (fmt), ##__VA_ARGS__)
+#define mx_logva(level, fmt, ap) mx_logva_do((level), __FILE__, __LINE__, __func__, (fmt), (ap))
 
 #define mx_log_fatal(fmt, ...)   mx_log(MX_LOG_EMERG,   (fmt), ##__VA_ARGS__)
 #define mx_log_emerg(fmt, ...)   mx_log(MX_LOG_EMERG,   (fmt), ##__VA_ARGS__)
@@ -33,6 +34,16 @@
 #define mx_log_info(fmt, ...)    mx_log(MX_LOG_INFO,    (fmt), ##__VA_ARGS__)
 #define mx_log_debug(fmt, ...)   mx_log(MX_LOG_DEBUG,   (fmt), ##__VA_ARGS__)
 
+#define mx_logva_fatal(fmt, ap)   mx_log(MX_LOG_EMERG,   (fmt), (ap))
+#define mx_logva_emerg(fmt, ap)   mx_log(MX_LOG_EMERG,   (fmt), (ap))
+#define mx_logva_alert(fmt, ap)   mx_log(MX_LOG_ALERT,   (fmt), (ap))
+#define mx_logva_crit(fmt, ap)    mx_log(MX_LOG_CRIT,    (fmt), (ap))
+#define mx_logva_err(fmt, ap)     mx_log(MX_LOG_ERR,     (fmt), (ap))
+#define mx_logva_warning(fmt, ap) mx_log(MX_LOG_WARNING, (fmt), (ap))
+#define mx_logva_notice(fmt, ap)  mx_log(MX_LOG_NOTICE,  (fmt), (ap))
+#define mx_logva_info(fmt, ap)    mx_log(MX_LOG_INFO,    (fmt), (ap))
+#define mx_logva_debug(fmt, ap)   mx_log(MX_LOG_DEBUG,   (fmt), (ap))
+
 int mx_log_log(int level, int loglevel, char *file, unsigned long line, const char *func, const char *msg) __attribute__ ((weak));
 int mx_log_print(char *msg, size_t len) __attribute__ ((weak));
 
diff --git a/test_mx_util.c b/test_mx_util.c
index 817fbef..06cfe72 100644
--- a/test_mx_util.c
+++ b/test_mx_util.c
@@ -345,7 +345,7 @@ static void test_mx_strscan(void)
     assert(pps->ppid == getppid());
     assert(pps->state == 'R');
     assert(mx_streq(pps->comm, program_invocation_short_name) || mx_streq(pps->comm, "memcheck-amd64-"));
-    mx_proc_pid_stat_free(pps);
+    mx_proc_pid_stat_free_content(pps);
 }
 
 static void test_mx_strvec() {